Digital Scale Teaching Element

This lesson, from the Technological Education Pathways Partnership (TEPP), uses a bathroom scale to explore the load cell technology used in weigh stations on interstate highways. A Word document explains the concept of the Wheatstone bridge measure of electrical resistance, and two PowerPoint presentations lead students in dismantling a bathroom scale and balancing the bridge of the scale's load cell. The lesson is designed to be used in introductory electricity and electronics courses.